/Engine/Source/Runtime/Engine/Public/WorldPartition/WorldPartitionStreamingSource.h
Helper method that iterates over all shapes. If none is provided, it will still pass a sphere shape using Radius or grid's loading range (see bUseGridLoadingRange).
void ForEachShape ( float InGridLoadingRange, [FName](API\Runtime\Core\UObject\FName) InGridName, const [FSoftObjectPath](API\Runtime\CoreUObject\UObject\FSoftObjectPath) & InGridHLODLayer, bool bInProjectIn2D, [TFunctionRef](API\Runtime\Core\GenericPlatform\TFunctionRef)< void(const [FSphericalSector](API\Runtime\Engine\WorldPartition\FSphericalSector) &)> InOperation ) const